<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-4298</journal-id>
<journal-title><![CDATA[Botanical Sciences]]></journal-title>
<abbrev-journal-title><![CDATA[Bot. sci]]></abbrev-journal-title>
<issn>2007-4298</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Botánica de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-42982026000300739</article-id>
<article-id pub-id-type="doi">10.17129/botsci.3879</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Quantitative micromorphological characterization as a tool for the taxonomic identification of phylogenomic oak lineages]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Saldaña]]></surname>
<given-names><![CDATA[Saddan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valencia-Ávalos]]></surname>
<given-names><![CDATA[Susana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Elizondo]]></surname>
<given-names><![CDATA[M. Socorro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras-Negrete]]></surname>
<given-names><![CDATA[Gonzalo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hipp]]></surname>
<given-names><![CDATA[Andrew L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Rodríguez]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Investigaciones en Ecosistemas y Sustentabilidad ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Ciencias Departamento de Biología Comparada]]></institution>
<addr-line><![CDATA[Coyoacán Mexico City]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional ]]></institution>
<addr-line><![CDATA[ Durango]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Escuela Nacional de Estudios Superiores ]]></institution>
<addr-line><![CDATA[León ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,The Morton Arboretum  ]]></institution>
<addr-line><![CDATA[Lisle IL]]></addr-line>
<country>Estados Unidos</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,The Field Museum  ]]></institution>
<addr-line><![CDATA[Chicago IL]]></addr-line>
<country>Estados Unidos</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2026</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2026</year>
</pub-date>
<volume>104</volume>
<numero>3</numero>
<fpage>739</fpage>
<lpage>754</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-42982026000300739&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-42982026000300739&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-42982026000300739&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Foliar micromorphological analysis has proven recurrently to be a valuable tool for assessing relationships at different taxonomical levels in the Quercus genus. However, Quercus is characterized by complicated taxonomic patterns resulting from frequent convergent evolution of vegetative characters, low differentiation among closely related species, and hybridization. These problems may be compounded by purely qualitative approaches to documenting the micromorphological intraspecific and interspecific variation.  Question: Which combinations of micromorphological traits can distinguish between the different genomic lineages within the Quercus laeta complex?  Studied species: Quercus laeta  Study site and dates: Mexico  Methods: We used scanning electron microscopy to qualitatively and quantitatively analyze trichomes and foliar waxes in 70 individuals from six previously identified lineages within the Quercus laeta complex. Our goal was to assess the taxonomic value of these micromorphological traits and to provide morphological support for the potential species status of these lineages.  Results:  Our results indicate that the presence or absence of stellate trichomes, the number of both glandular and non-glandular trichomes, the number of arms, and the arm length of trichomes are key features for discriminating among lineages.  Conclusions: Our findings provided useful information to correctly identify and discriminate among genomic lineages of the Quercus laeta complex by highlighting quantitative (continuous) differences, contrary to the mostly qualitative (categorical) differences that have historically been used to discriminate among Mexican oak species.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: El análisis micromorfológico foliar ha demostrado ser una herramienta valiosa para evaluar las relaciones a diferentes niveles taxonómicos en el género Quercus. Sin embargo, Quercus se caracteriza por patrones taxonómicos complejos resultantes de la frecuente evolución convergente de caracteres vegetativos, la baja diferenciación entre especies estrechamente relacionadas y la hibridación. Estos problemas pueden verse agravados por enfoques puramente cualitativos para documentar la variación micromorfológica intraespecífica e interespecífica.  Pregunta: ¿Qué combinaciones de caracteres micromorfológicos pueden distinguir los diferentes linajes genómicos dentro del complejo Quercus laeta?  Especie estudiada: Quercus laeta  Sitio y fecha de estudio: México  Métodos . Utilizamos microscopía electrónica de barrido para analizar cualitativa y cuantitativamente los tricomas y las ceras foliares de 70 individuos pertenecientes a seis linajes previamente identificados dentro del complejo Quercus laeta. Nuestro objetivo fue evaluar el valor taxonómico de estos rasgos micromorfológicos y brindar evidencia morfológica que respalde la posible clasificación de estos linajes como especies.  Resultados: Nuestros resultados indican que la presencia o ausencia de tricomas estrellados, el número de tricomas glandulares y no glandulares, el número de brazos y la longitud de los brazos de los tricomas son características clave para discriminar entre linajes.  Conclusiones: Nuestros hallazgos proporcionan información útil para identificar y discriminar correctamente entre linajes genómicos del complejo Quercus laeta al resaltar las diferencias cuantitativas (continuas), contrariamente a las diferencias cualitativas (categóricas) que históricamente se han utilizado para discriminar entre especies de encinos mexicanos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[North America]]></kwd>
<kwd lng="en"><![CDATA[scanning electron microscopy]]></kwd>
<kwd lng="en"><![CDATA[species discovery]]></kwd>
<kwd lng="en"><![CDATA[trichome]]></kwd>
<kwd lng="en"><![CDATA[morphology]]></kwd>
<kwd lng="es"><![CDATA[Norteamérica]]></kwd>
<kwd lng="es"><![CDATA[microscopia electrónica de barrido]]></kwd>
<kwd lng="es"><![CDATA[descubrimiento de especies]]></kwd>
<kwd lng="es"><![CDATA[tricomas]]></kwd>
</kwd-group>
</article-meta>
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